In TV OS 13 of Apple TV is PIP (picture in picture) prepared. The TV app can already be displayed as a PIP. It would be great if you ride Zwift and can watch a movie on the side. Also, it would be nice if the movie is running in full screen mode and Zwift is displayed as a PIP.
I fully agree, this is something that is missing. I wonder why others are not craving for that. May be more users should give their support via this forum.